Insulator.



W. H. CREAMER.

INSULATOR.

APPLICATION FILED JULY 20.1911.

Patented Apr. 23, 1918.

[44% Cream er,

WILLIAMYYH. CREAMER, 0E LEOMA, TENEEssEE.

INSULATOR.

Specification of Letters Patent.

Patented Apr. 23, 1918.

Application filed July 20, 1917. Serial No. 181,888.

To all whom it may concern:

- Be it known that 1, WILLIAM H. CREAMER, a citizen of the United States, residing at Leoma, in the county of Lawrence and State of Tennessee, have invented certain new and useful Improvements in Insulators, of which the followin is a specification.

My invention relates to new and'useful improvements in insulators for use in stringing light, telegraph and telephone wires upon their poles and oross-trees, the primary object of my invention being the provision of an insulator which will securely clamp the wire in place and which will, therefore, do away with the employment of any anchoring or binding wires.

The glass and porcelain insulators now commonly employed are of such a character that the line wire must be lashed to them by sections of wire, which is not only eX- pensive on account of the additional wire employed, which is considerable, but also because of the time necessary for lashing the wire to the insulator.

More specifically my improved insulator includes a base section and a clamping cap section which cooperate with a novel form of supporting peg and with each other in such a manner as to rigidly secure the wire and yet insulate it from the pole. In this connection my invention resides in forming the base portion of the insulator with a wire receiving groove and the cap portion with a roughened or corrugated face for clamping engagement with the wire seated in the groove.

With these and other objects in view, my invention will be more fully described, illustrated in the accompanying drawings, and thenspecifically pointed out in the claims which are attached to and form a part of this specification.

In the drawings:

Figure 1 is a perspective view of my im proved insulator;

Fig. 2 is a central sectional view taken at an angle to the plane of the wire receiving grooves;

Fig. 3 is a top plan view of the base section; Fig. 4: is a bottom plan view of the cap section.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

My improved insulator includes a peg 10, and an insulator proper 11 including a base section 12 and cap section 13. The peg which is usually formed of Wood is of conventional construction with the usual threaded neck 14, the only distinction being that its neck throughout a portion of its height is formed with a diametric wire receiving slot 15.

The base portion 12 of the insulator proper is formed of glass, porcelain or other suitable insulating material and is frusto-conical in shape being provided with an axial threaded bore 16 for engagement about the peg and being so proportioned that its upper face somewhat above the bottom of the slot 15 of the peg when the base portion of the insulator is in place. The bottom of this base portion may be formed with a marginal depending drip flange 17 if desired,

and its upper face is formed with one or more, preferably two, diametrically extending wire receiving grooves or channels 18 which are V-shaped in cross section. If there are more than one of these channels they preferably intersect each other at an acute angle so that either one or the other may be brought into alinement with the slot of the peg, depending upon the engagement of the threads of the peg and base, as will be later apparent.

The cap section of the insulator is substantially cylindrical in shape having its bottom surface proportioned to engage against and coincide with the upper face of the base section 12 and its upper end rounded as shown at 19. This cap section is formed with an internally threaded socket 20 for engagement over the free end of the peg and near its top has its outer surface provided with a plurality of peripherally spaced grooves or channels 21 to provide a roughened surface so that it may be more readily threaded upon the peg. The lower face of the cap piece 11 is provided with a plurality of relatively fine, shallow, closely spaced radial grooves or channels 22 or may be otherwise corrugated if preferred. Preferably the threaded socket of this piece is so formed as to slightly bind together the bifurcated end of the peg when it is applied so that the resiliency of the peg will in a manner serve to additionally lock the cap piece in place.

When employing the insulator its peg is mounted upon the supporting pole or crosstree in the usual manner by spikes, screws,

bolts or other suitable fastening means. The base portion 12 of the insulator is then threaded upon the peg and turned until'one of its grooves or channels aline with the slot of the peg when the line wire is strung through the slot of the peg to seat in such groove orcha'nnelofthe base after which the cap piece of the insulator is threaded on to the peg to closely clamp the Wire between it and the base portion and in the groove of the base portion.

Having thus described the invention, what is claimed as new is:

1. In an insulator, the combination of a supporting peg having an open ended slot in its upper extremity and exteriorlythread:

ed, a base member having an interiorly the upper end of the base member, the lower end of said cap member being provided with radiallydisposed grooves any one of which may engage over the line wire.

2. In an insulator, the combination of a supporting peg having an open-ended slot in its upper extremity and exteriorly threaded, a base member having an interriorly threaded bar adapted to engage the exteriorly threaded extremity of the peg and being provided in its upper end with a diametric groove adapted to aline with the slot in the peg whereby to receive a line wire, and a cap section having an interiorly threaded socket in its lower portion adapted to engage the exteriorly threaded extremity ofthe peg and ride thereon to bear against the upper end of the base member, the lower end of said cap member being provided with radially disposed grooves, anyone of which may engage over the line wire, said cap section being further provided with exterior depressions near its upper extremity.

In testimony whereof I aflix my signature.

WILLIAM H. CREAMER. [-L.s.]

(lo lies oi thispatent may be obtained forfive cents each, by addressing the Commissioner of Patents,

Washington, D. C. i 

